Rebar Termination Sleeve With Serrated Clamp
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Solution Overview
Problem
Existing rebar systems face challenges in efficiently terminating concrete reinforcing bars, particularly in congested environments, where hooked bars are difficult to fit, leading to congestion and inefficient force transfer.
Innovation Solution
A rebar system comprising a sleeve with a frusto-conical tapered wall and a clamp with serrated members, where a threaded member drives the clamp axially and radially to secure the rebar, providing a termination solution that alleviates congestion and improves force transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hooked bars are used in congested walls, then force transfer is achieved, but congestion and difficulty in placement occur
Solution Approach 1:
The rebar system is divided into separate components: a sleeve that fits over the rebar end and a separate clamp that attaches to the sleeve. This segmentation allows the components to be assembled and positioned more easily in congested areas compared to traditional hooked bars, while still achieving the necessary force transfer through the clamp-sleeve-rebar connection.
Solution Approach 2:
The sleeve acts as an intermediary component between the rebar and the clamp. It provides a mounting surface for the clamp and a bearing face for force transfer to the concrete, eliminating the need for hooked bar configurations that cause congestion while maintaining structural integrity.
2Reliability
If traditional rebar termination methods are used, then structural requirements are met, but congestion and inefficient concrete placement occur
Solution Approach 1:
Instead of using traditional three-dimensional hooked bar terminations that extend into the concrete volume, this invention uses a sleeve and clamp assembly that terminates the rebar in a different dimensional configuration. The clamp provides a bearing face that transfers forces directly to the concrete surface, reducing congestion and improving concrete placement efficiency.
3Ease of manufacture
If a multi-piece clamp system is used, then ease of assembly is improved, but device complexity increases
Solution Approach 1:
The clamp is divided into multiple pieces that can be assembled around the rebar and secured to the sleeve. This segmentation allows for easier assembly and adjustment in the field, with each clamp piece being simpler to manufacture and position individually, while the overall system provides the necessary clamping force through the combined action of all pieces.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively secures the rebar, reducing congestion and enhancing the placement and consolidation of concrete, allowing for efficient force transfer and improved constructability in concrete structures.
Implementation Method 1
a threaded member which forces and drives the clamping members axially along a frusto-conical or tapered wall of the sleeve
Implementation Method 2
the threaded member forces the clamp members to move axially within the sleeve and ultimately radially into engagement with the concrete reinforcing bar
Implementation Method 3
a multi-piece clamp that has a plurality of clamping members and an interior wall that is serrated to facilitate gripping the concrete reinforcing bar
Data Source
AI summary
A rebar system having a sleeve, a clamp that has at least one or a plurality of clamp members and a threaded member which engages the clamp members and urges them in the sleeve in a manner that causes a radial dimension between the clamp members to be reduced until the clamp engages a concrete reinforcing bar and clamps thereagainst.